Sherlock Holmes was a scientist who used chemistry, bloodstains and minute traces of evidence to catch the criminal. In an era when eyewitness reports and "'smoking gun" evidence were needed to convict criminals and police incompetence meant that Jack the Ripper stalked the streets freely, Holmes' crime-scene methods were revolutionary. Forensic scientists, crime historians and Sherlockian experts reveal for the first time the astonishing impact the fictional detective had on the development of real-life criminal investigation and forensic techniques. Using a mix of interviews, drama reconstruction and archives, HOW SHERLOCK CHANGED THE WORLD tells the story of the impact and legacy of the most famous crime fighter in history.